ConforMIS, a Burlington, MA maker of orthopedic implants, has announced yesterday the availability of the firm’s new personalized bicompartmental knee implants. The iDuo™ Bicompartmental Knee Resurfacing System is shaped to the individual recipient from his or her CT scans, the big idea being to reduce the size of the implant and therefore preserve more of the natural bone.
The iDuo is a bicompartmental resurfacing implant designed for patients whose arthritic damage is limited to either the medial or lateral compartment of the knee, in addition to the patellofemoral compartment. Approximately 30% to 50% of patients who receive a total knee replacement today exhibit symptoms of osteoarthritis in just one or two of the three compartments of the knee.
The iDuo resurfaces only the affected areas, preserving far more bone on both the femur and tibia than traditional knee replacement surgery. The iDuo also preserves both the anterior and posterior cruciate ligaments, helping to maintain natural knee kinematics. The extent of tissue preservation with the iDuo helps patients retain their future surgical options.
Each iDuo is designed from an individual patient’s CT scan using the company’s proprietary iFit™ technology and made specifically for that patient. Because it is patient-specific, the iDuo allows for individualized fit, including full coverage of the tibial cortical rim, and a simplified surgical technique.
The iDuo comes packaged together with patient-specific instrumentation called iJigs™, which are designed from the same scans as the implant, including data on the patient’s biomechanical axis. The iJig cutting and placement guides eliminate manual sizing during surgery and provide tactile guidance to precisely place the instruments, simplifying the surgical technique. One tray of disposable iJigs replace multiple trays of traditional instrumentation that would typically have cost a hospital several hundred dollars per surgery in instrument handling, storage, sterilization and lost operating room time.